Excitation fluence dependence of spin-wave dynamics and intrinsic Gilbert damping in epitaxial Co<sub>2</sub>FeAl film

Li, Shufa; Cheng, Chuyuan; Meng, Kangkang; Chen, Chunlei

doi:10.7567/1347-4065/ab07eb

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…In ferromagnetic materials, spin polarization near the Fermi surface plays an important role in spintronics [1][2][3][4][5][6][7]. These materials attracted much attention, especially in magnetoelectronics [8], tunneling magnetic resonance (TMR) [9][10][11], and spin waves [12][13][14]. Therefore, halfmetallic ferromagnetics (HMFs) are important materials for spintronics, because they have a band gap at the Fermi surface in one of the spin direction and this exhibits 100% spin polarization at the Fermi surface [15].…”

Section: Introductionmentioning

confidence: 99%

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir₂CrX (X = Si, Ge) Compounds

Forozani

2020

Acta Phys. Pol. A

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The structural, electronic, magnetic, and vibrational properties of full-Heusler compounds Ir2CrSi and Ir2CrGe based on the density functional theory are investigated. Ir2CrSi is half-metallic ferromagnet at equilibrium lattice constant and preserves its half-metallic behavior under stress. Ir2CrGe just represents half-metallicity under stress. For this reason, we changed the equilibrium lattice constant from −4%a0 to +4%a0 in a range of a = (a0 ± x%a0), where x = 1, 2, 3, 4, and calculations were done for these new lattice parameters. In all of this interval Ir2CrSi holds its half-metallic property. The dynamical stability at equilibrium lattice constant and under stress have been investigated. The Ir2CrSi compound has dynamical stability at lattice constant a = a0 − 3%a0 and a = a0 − 4%a0.

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Section: Introductionmentioning

confidence: 99%

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir₂CrX (X = Si, Ge) Compounds

Forozani

2020

Acta Phys. Pol. A

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“…Эта работа дала толчок для целого ряда исследований СВ, возбуждаемых в различных материалах под действием света. В частности, о применении оптических методик для полностью оптического возбуждения и детектирования магнитостатических СВ в металлах сообщалось для тонких пленок пермаллоя [105][106][107][108][109], CoFeB [110] и сплавов Гейслера [111][112][113]. Механизмом возбуждения при этом являлся процесс сверхбыстрого размагничивания за счет нагрева (см.…”

Section: оптическое возбуждение спиновых волнunclassified

“…Работа [128] дала толчок к исследованию распространения магнитостатических СВ в металлических пленках [105][106][107][108][109][110][111][112][113]. Однако во всех этих работах возбуждающим механизмом для СВ являлось изменение анизотропии формы при сверхбыстром размагничивании.…”

Section: сверхбыстрое изменение магнитной анизотропии и возбуждение свunclassified

Сверхбыстрое Лазерно-Индуцированное Управление Магнитной Анизотропией Наноструктур

Калашникова¹,

Хохлов²,

Шелухин³

et al. 2021

Журнал Технической Физики

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Employing short laser pulses with a duration below 100 fs for changing magnetic state of magnetically-ordered media has developed into a distinct branch of magnetism —femtomagnetism which aims at controlling magnetization at ultimately short timescales. Among plethora of femtomagnetic phenomena, there is a class related to impact of femtosecond pulses on magnetic anisotropy of materials and nanostructures which defines orientation of magnetization, magnetic resonance frequencies and spin waves propagation. We present a review of main experimental results obtained in this field. We consider basic mechanisms responsible for a laser-induced change of various anisotropy types: magnetocrystalline, magnetoelastic, interfacial, shape anisotropy, and discuss specifics of these processes in magnetic metals and dielectrics. We consider several examples and describe features of magnetic anisotropy changes resulting from ultrafast laser-induced heating, impact of laser-induced dynamic and quasistatic strains and resonant excitation of electronic states. We also discuss perspectives of employing various mechanisms of laser-induced magnetic anisotropy change for enabling processes prospective for developing devices. We consider precessional magnetization switching for opto-magnetic information recording, generation of high-frequency strongly localized magnetic excitations and fields for magnetic nanotomography and hybrid magnonics, as well as controlling spin waves propagation for optically-reconfigurable magnonics. We further discuss opportunities which open up in studies of ultrafast magnetic anisotropy changes because of using short laser pulses in infrared and terahertz ranges.

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“…[1][2][3][4][5] As a half metal, cobalt-based full-Heusler ferromagnetic alloy film is the promising material for spintronics, [6][7][8] owing to their high spin polarization and Curie temperature, and the existence of multiple spinwave modes. [9,10] Moreover, such alloy normally presents low Gilbert damping, [11] which is a key parameter for transporting, storing, and processing information in magnonics. Therefore, understanding and controlling the magnetic damping in Heusler alloys becomes crucial importance.…”

Section: Introductionmentioning

confidence: 99%

The unique magnetic damping enhancement in epitaxial Co₂Fe_1−xMn_xAl films*

Cheng

Meng

et al. 2019

Chinese Phys. B

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Uniform precession dynamics and its magnetic damping are investigated in epitaxial Co2Fe1−x Mn x Al films by using the time-resolved magneto–optical Kerr effect under out-of-plane configuration. The decay time of uniform precession mode decreases, and thus the magnetic damping increases with the increase of external field. Moreover, the decay time decreases as x decreases, so that the enhancement of magnetic damping occurs in Fe-rich sample. Furthermore, the decay time decreases as the excitation fluence increases, which drops rapidly at low magnetic field comparing with the slow reduction at high magnetic field. This unique magnetic damping enhancement is attributed to the enhancement of homogeneous magnetization.

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Excitation fluence dependence of spin-wave dynamics and intrinsic Gilbert damping in epitaxial Co₂FeAl film

Cited by 8 publications

References 28 publications

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir₂CrX (X = Si, Ge) Compounds

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir₂CrX (X = Si, Ge) Compounds

Сверхбыстрое Лазерно-Индуцированное Управление Магнитной Анизотропией Наноструктур

The unique magnetic damping enhancement in epitaxial Co₂Fe_1−xMn_xAl films*

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Excitation fluence dependence of spin-wave dynamics and intrinsic Gilbert damping in epitaxial Co2FeAl film

Cited by 8 publications

References 28 publications

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir2CrX (X = Si, Ge) Compounds

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir2CrX (X = Si, Ge) Compounds

Сверхбыстрое Лазерно-Индуцированное Управление Магнитной Анизотропией Наноструктур

The unique magnetic damping enhancement in epitaxial Co2Fe1−xMnxAl films*

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Excitation fluence dependence of spin-wave dynamics and intrinsic Gilbert damping in epitaxial Co₂FeAl film

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir₂CrX (X = Si, Ge) Compounds

Structural, Electronic, Magnetic and Vibrational Properties of Full-Heusler Ir₂CrX (X = Si, Ge) Compounds

The unique magnetic damping enhancement in epitaxial Co₂Fe_1−xMn_xAl films*